Fourier transform application
In the previous sections, you learned how to use numpy.fft for a one and multi-dimensional ndarray, and saw the implementation details underneath the hood. Now it's time for some applications. In this section, we are going to use the Fourier transform to do some image processing. We will analyze the spectrum, and then we will interpolate the image to enlarge it to twice the size. First, let's download the exercise image from the Packt Publishing website blog post:
https://www.packtpub.com/books/content/python-data-scientists. Save the image to your local directory as scientist.png.
This is a RGB image, which means ...
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